Rainbow Electronics DS14287 - Manual (Page 18)

DS14285/DS14287
18 of 25
AC ELECTRICAL CHARACTERISTICS Over the operating range
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
Cycle t
CYC
225 DC ns
Pulse Width, DS/E Low or RD/ WR
High
PW
EL
115 ns
Pulse Width, DS/E Low or RD/ WR
Low
PW
EH
80 ns
Input Rise and Fall Time t
R
, t
F
30 ns
R/ W Hold Time
t
RWH
10 ns
R/ W Setup Time Before DS/E
t
RWS
10 ns
Chip Select Setup Time Before DS,
WR , or RD
t
CS
20 ns
Chip Select Hold Time t
CH
0 ns
Read Data Hold Time t
DHR
10 50 ns
Write Data Hold Time t
DHW
0 ns
Muxed Address Valid Time to AS/ALE
Fall t
ASL
30 ns
Muxed Address Hold Time t
AHL
10 ns
Delay Time DS/E to AS/ALE Rise t
ASD
20 ns
Pulse Width AS/ALE High PW
ASH
60 ns
Delay Time, AS/ALE to DS/E Rise t
ASED
35 ns
Output Data Delay Time From DS/E or
RD
t
DDR
10 75 ns 9
Data Setup Time t
DSW
60 ns
Reset Pulse Width t
RWL
5
µ
s
IRQ Release from DS
t
IRDS
2
µ
s
IRQ Release from RESET
t
IRR
2
µ
s
AC TEST CONDITIONS
Input Pulse Level: 0 to 3.0V
Input Rise/Fall Times: 5 ns
Input and Output Timing Reference Levels: 1.5V
OUTPUT LOAD Figure 5